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    <title>1208</title>

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      /* 图片响应式布局 */
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      .bg6 {
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      .bg6,
      .bg6 .item {
        height: 500px;
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      @media only screen and (max-width: 768px) {
        .carousel-caption {
          bottom: 5%;
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        .bg6,
        .bg6 .item {
          height: 200px;
        }
      }
      .threerow {
        margin-top: 50px;
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      .bg-line {
        margin: 50px auto;
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      .bg-line > hr {
        border: 1px solid black;
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  </head>

  <body>
    <!-- 导航栏 -->
    <nav class="navbar navbar-inverse navbar-fixed-top">
      <div class="container">
        <!-- Brand and toggle get grouped for better mobile display -->
        <div class="navbar-header">
          <button
            type="button"
            class="navbar-toggle collapsed"
            data-toggle="collapse"
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            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
          <a class="navbar-brand" href="#">现代浏览器博物馆</a>
        </div>

        <!-- Collect the nav links, forms, and other content for toggling -->
        <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
          <ul class="nav navbar-nav">
            <li class="active">
              <a href="#">综述 <span class="sr-only">(current)</span></a>
            </li>
            <li><a href="#">简述</a></li>
            <li class="dropdown">
              <a
                href="#"
                class="dropdown-toggle"
                data-toggle="dropdown"
                role="button"
                aria-haspopup="true"
                aria-expanded="false"
                >特点 <span class="caret"></span
              ></a>
              <ul class="dropdown-menu">
                <li><a href="#">chorme</a></li>
                <li><a href="#">firefox</a></li>
                <li><a href="#">safari</a></li>
                <li><a href="#">opear</a></li>
                <li><a href="#">IE</a></li>
              </ul>
            </li>
            <li>
              <a href="javascript:;" data-target="#about" data-toggle="modal"
                >关于</a
              >
            </li>
          </ul>
        </div>
        <!-- /.navbar-collapse -->
      </div>
      <!-- /.container-fluid -->
    </nav>

    <!-- 轮播 -->
    <div
      id="carousel-example-generic"
      class="carousel slide bg6"
      data-ride="carousel"
    >
      <!-- Indicators，轮播图个数 -->
      <ol class="carousel-indicators">
        <li
          data-target="#carousel-example-generic"
          data-slide-to="0"
          class="active"
        ></li>
        <li data-target="#carousel-example-generic" data-slide-to="1"></li>
        <li data-target="#carousel-example-generic" data-slide-to="2"></li>
      </ol>

      <!-- Wrapper for slides -->
      <div class="carousel-inner" role="listbox">
        <div class="item active">
          <img src="../image/1.jpg" alt="..." />
          <div class="carousel-caption">
            <h3>古风画</h3>
            <p>无介绍</p>
          </div>
        </div>
        <div class="item">
          <img src="../image/2.jpg" alt="..." />
          <div class="carousel-caption">
            <h3>天气之子</h3>
            <p>无介绍</p>
          </div>
        </div>
        <div class="item">
          <img src="../image/3.jpg" alt="..." />
          <div class="carousel-caption">
            <h3>你的名字</h3>
            <p>无介绍</p>
          </div>
        </div>
      </div>

      <!-- Controls -->
      <a
        class="left carousel-control"
        href="#carousel-example-generic"
        role="button"
        data-slide="prev"
      >
        <span
          class="glyphicon glyphicon-chevron-left"
          aria-hidden="true"
        ></span>
        <span class="sr-only">Previous</span>
      </a>
      <a
        class="right carousel-control"
        href="#carousel-example-generic"
        role="button"
        data-slide="next"
      >
        <span
          class="glyphicon glyphicon-chevron-right"
          aria-hidden="true"
        ></span>
        <span class="sr-only">Next</span>
      </a>
    </div>

    <!-- 三列布局 -->
    <div class="container threerow">
      <div class="row">
        <div class="col-md-4 row-col text-center">
          <div class="thumbnail">
            <img src="../image/4.jpg" alt="..." />
            <div class="caption">
              <h3>Thumbnail label</h3>
              <p>这只是一个介绍</p>
            </div>
          </div>
        </div>
        <div class="col-md-4 row-col text-center">
          <div class="thumbnail">
            <img src="../image/5.jpg" alt="..." />
            <div class="caption">
              <h3>Thumbnail label</h3>
              <p>这只是一个介绍</p>
            </div>
          </div>
        </div>
        <div class="col-md-4 row-col text-center">
          <div class="thumbnail">
            <img src="../image/6.jpg" alt="..." />
            <div class="caption">
              <h3>Thumbnail label</h3>
              <p>这只是一个介绍</p>
            </div>
          </div>
        </div>
      </div>
    </div>

    <!-- 分割线 -->
    <div class="container bg-line">
      <hr />
    </div>

    <!-- 标签页 -->
    <div class="container">
      <!-- Nav tabs -->
      <ul class="nav nav-tabs" role="tablist">
        <li role="presentation" class="active">
          <a href="#home" aria-controls="home" role="tab" data-toggle="tab"
            >1</a
          >
        </li>
        <li role="presentation">
          <a
            href="#profile"
            aria-controls="profile"
            role="tab"
            data-toggle="tab"
            >2</a
          >
        </li>
        <li role="presentation">
          <a
            href="#messages"
            aria-controls="messages"
            role="tab"
            data-toggle="tab"
            >3</a
          >
        </li>
        <li role="presentation">
          <a
            href="#settings"
            aria-controls="settings"
            role="tab"
            data-toggle="tab"
            >4</a
          >
        </li>
      </ul>
      <!-- Tab panes -->
      <div class="tab-content">
        <div role="tabpanel" class="tab-pane active" id="home">
          <div class="container-fluid">
            <div class="row">
              <!-- 内容和图片大概5、7分 -->
              <div class="col-md-7">
                <h3>只是一个标题</h3>
                <p>11111111</p>
              </div>
              <div class="col-md-5">
                <img src="../image/7.jpg" />
              </div>
            </div>
          </div>
        </div>
        <div role="tabpanel" class="tab-pane" id="profile">
          <div class="container-fluid">
            <div class="row">
              <!-- 内容和图片大概5、7分 -->
              <div class="col-md-5">
                <img src="../image/8.jpg" />
              </div>
              <div class="col-md-7">
                <h3>只是一个标题</h3>
                <p>2222222222</p>
              </div>
            </div>
          </div>
        </div>
        <div role="tabpanel" class="tab-pane" id="messages">
          <div class="container-fluid">
            <div class="row">
              <!-- 内容和图片大概5、7分 -->
              <div class="col-md-7">
                <h3>只是一个标题</h3>
                <p>33333333333333333</p>
              </div>
              <div class="col-md-5">
                <img src="../image/9.jpg" />
              </div>
            </div>
          </div>
        </div>
        <div role="tabpanel" class="tab-pane" id="settings">
          <div class="container-fluid">
            <div class="row">
              <!-- 内容和图片大概5、7分 -->
              <div class="col-md-5">
                <img src="../image/10.jpg" />
              </div>
              <div class="col-md-7">
                <h3>只是一个标题</h3>
                <p>44444444444</p>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>

    <!-- 版权 -->
    <div class="container">@by youli's demo</div>

    <!-- 模态框 -->
    <div class="modal fade" tabindex="-1" role="dialog" id="about">
      <div class="modal-dialog" role="document">
        <div class="modal-content">
          <div class="modal-header">
            <button
              type="button"
              class="close"
              data-dismiss="modal"
              aria-label="Close"
            >
              <span aria-hidden="true">&times;</span>
            </button>
            <h4 class="modal-title">模态框</h4>
          </div>
          <div class="modal-body">
            <p>我是一个模态框</p>
          </div>
          <div class="modal-footer">
            <button type="button" class="btn btn-default" data-dismiss="modal">
              Close
            </button>
          </div>
        </div>
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